Electrospinning Machine | A Flexible Temperature Sensor with Ultrafast Response Speed and High Stability Achieved by Improving Substrate Thermal Conductivity and Radiative Cooling

Challenge: Flexible temperature sensors have great application potential in human-computer interaction and disaster prevention systems. However, slow response speed makes it difficult to quickly respond to human health status, and it is difficult to maintain their stability in various environments, limiting their scope of use. 

Method: Peng Wang from University of Jinan & Chuizhou Meng from Zhejiang Sci-Tech University and others, using electrospun nanofibers as a substrate, by introducing oriented BNNS to enhance thermal conduction, adding PANI/G to achieve high sensitivity, and covering with TPU/SiO2 nanofibers to enhance stability, finally obtained a flexible temperature sensor that can be used for long-term human body monitoring, respiratory monitoring, and battery temperature measurement. 

Innovation 1: Introducing highly thermally conductive oriented boron nitride nanosheets (BNNS) into thermoplastic polyurethane (TPU) nanofibers improved the response speed (0.32 s); by adding polyaniline (PANI) to graphene (G), high sensitivity (0.077°C−1) was achieved. 

Innovation 2: Using TPU/silica (SiO2) nanofibers to cover the sensing layer and adopting a direct printing preparation method achieved high stability and a high signal-to-noise ratio (SNR). 

Innovation 3: In addition, the TPU/SiO2 nanofibers and TPU/BNNS nanofibers with high visible light reflectivity give the sensor excellent personal thermal management capability, reducing body temperature by 5°C under outdoor conditions compared to standard clothing. 

https://doi.org/10.1002/adfm.202512296